Althon Rectangular Headwalls are made from precast concrete for pipework discharging into ponds, swales, ditches, rivers, and tidal environments. For pipe diameters up to 750mm, headwalls have customisable backwall widths and heights, with cast openings to suit pipe material and diameter. Wingwalls project at 90 degrees to the backwall, with several wingwall profiles and toe extension options to suit different site conditions.

  • Precast concrete headwalls for pipework up to 750mm diameter

  • Customisable backwall widths and heights

  • Openings cast to match pipe material and diameter

  • Wingwalls at 90 degrees with profile options

  • Toe extensions up to 1000mm deep

  • Factory-fitted accessories including flap valves, penstocks, handrails, trash screens, and safety grilles

  • RSFA range designed to meet Severn Trent Water outfall requirements

  • BIM files and datasheets available

Applications

  • Ponds

  • Swales

  • Ditches

  • Rivers

  • Tidal environments

  • Adoptable sewer outfalls

  • Surface water drainage systems

Dimensions

  • Backwall height: 600mm to 1300mm

  • Pipework: up to 750mm diameter

  • Toe extension thickness: 300mm or 500mm

  • Toe extension depth: up to 1000mm

Materials

Made from precast concrete

Options and variations

  • Multiple backwall widths and heights

  • Custom cast pipe openings

  • Different wingwall profiles

  • Sewers for Adoption (RSFA) compliant models

  • Flap valves

  • Penstocks

  • Handrails

  • Trash screens

  • Outfall safety grilles